WO2006018899A1 - 検出用器具を用いた検出方法 - Google Patents
検出用器具を用いた検出方法 Download PDFInfo
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- WO2006018899A1 WO2006018899A1 PCT/JP2004/012043 JP2004012043W WO2006018899A1 WO 2006018899 A1 WO2006018899 A1 WO 2006018899A1 JP 2004012043 W JP2004012043 W JP 2004012043W WO 2006018899 A1 WO2006018899 A1 WO 2006018899A1
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- detection
- substance
- reaction solution
- recess
- reaction
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
- G01N33/50—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
- G01N33/53—Immunoassay; Biospecific binding assay; Materials therefor
- G01N33/543—Immunoassay; Biospecific binding assay; Materials therefor with an insoluble carrier for immobilising immunochemicals
- G01N33/54366—Apparatus specially adapted for solid-phase testing
- G01N33/54386—Analytical elements
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12Q—MEASURING OR TESTING PROCESSES INVOLVING ENZYMES, NUCLEIC ACIDS OR MICROORGANISMS; COMPOSITIONS OR TEST PAPERS THEREFOR; PROCESSES OF PREPARING SUCH COMPOSITIONS; CONDITION-RESPONSIVE CONTROL IN MICROBIOLOGICAL OR ENZYMOLOGICAL PROCESSES
- C12Q1/00—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions
- C12Q1/68—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions involving nucleic acids
- C12Q1/6813—Hybridisation assays
- C12Q1/6827—Hybridisation assays for detection of mutation or polymorphism
Definitions
- the present invention relates to a biological detection method performed using a detection instrument having a fine structure.
- SNPs single nucleotide polymorphisms
- polymorphic markers 80 0 It is said that it is more than%.
- expectations are high for the search for disease-related genes using this SNPs and the development of new drugs, that is, drug discovery.
- microarray-like substrates are being provided for the purpose of improving the efficiency of various gene analyses, and by performing hybridization reactions on a very large number of nucleotide chains on a small chip. The functions of specific genes are being clarified. In this way, the use of a microarray-like substrate makes it possible to efficiently perform a hybridization reaction that requires a large number of combinations. Furthermore, compared to conventional methods, the amount of sample to be used can be significantly reduced. Can be small.
- a microarray-like substrate currently used is a high-precipitation method in which a homogeneous solution derived from a sample is applied at once on a chip on which various probes and targets are arranged in a solid phase. Different sequences in different solutions at once It is an efficient analysis tool that can be analyzed.
- a micro-dispensing machine that can dispense units is essential. (If the reaction reagent is only dispensed into a small number of recesses, it is possible to do it with a manual method. It is very difficult to handle).
- An ink jet micro dispenser (such as Cartesian's synQUAD TM) can be used as the micro dispenser.
- an ink jet type microdispensing machine is essential.
- micro-dispensing machine when dispensing the same type of reagent in whole or over a wide area, a micro-dispensing machine has been essential until now. It is known that even insignificant factors can cause measurement errors in detection work using microarray-like substrates that require the use of such microdispensers. For example, when dispensing different types of specimens, etc. on a microarray-like substrate, a washing operation is performed before each different solution is aspirated in order to prevent mixing of different solutions in the nozzles and pipes of the dispenser. Takes time. The problem is that during this time, the volume difference due to evaporation increases between the first and last dispensed samples.
- the specimens that were first dispensed into the recesses are dried, and then the same reaction solution is quickly dispensed together (second If this is done, the possibility of capacity change between the recesses can be greatly reduced.
- second dispensing the dried specimen and the like after the first dispensing are dissolved and brought into contact with the reaction solution, and the desired detection reaction is started.
- An object of the present invention is to provide a means for performing a liquid phase reaction in a detection instrument for performing a biological reaction, such as a microarray. Disclosure of the invention
- the inventor of the present invention such as a microarray-like substrate in which minute concave portions are provided at a plurality of locations by subjecting a detection object such as a specimen to the first dispensing. It has been found that the above problem can be solved by adhering to the inner wall of the concave portion of the detection instrument and bringing the detection object into contact with the reaction solution in a short time.
- the present invention attaches the detection target to the inner wall of the recess of the detection instrument having a plurality of recesses on the surface, and attaches the detection target to the reaction solution containing the reactive substance for the detection target.
- a detection method using a detection instrument (hereinafter also referred to as the present detection method) that makes contact with the inner wall of the recessed portion of the detection instrument that has been detected, detects a signal generated by this contact, and evaluates the detection object. It is the invention which provides.
- this detection method an embodiment in which a detection target and a specific substance are allowed to coexist on the inner wall of a minute recess can be mentioned.
- the allowable operation time from the second dispensing to the detection is obtained. Can be extended to facilitate the detection of the desired biological response.
- the present invention provides an inner wall of a recess of a detection instrument having a plurality of recesses on the surface,
- a substance in which a phase change from solid to liquid is observed in the substance itself or in a mixture of the substance and a solvent at about 10 to 90 ° C together with the detection target (hereinafter also referred to as temperature responsive substance)
- a substance that slowly dissolves in a solvent at room temperature (hereinafter also referred to as a slowly soluble substance) is allowed to coexist and adhere to the substance (1) and Z or (2) at the time of detection.
- the temperature in the minute recesses is raised above the melting temperature of the fusible substance or lowered below the melting temperature
- Poly (N-isopropyl acrylamide) has the property of solidifying with increasing temperature and liquefying with decreasing temperature. Therefore, when this is used as a temperature responsive substance, the temperature of the dispensing solution is lowered to the liquefaction temperature during the first dispensing, and the temperature of the recess is raised to the solidification temperature after the dispensing, while the second dispensing is performed. It is preferable to bring the reaction solution into contact by pouring and lower the temperature of the recess to the liquefaction temperature during detection]
- the present invention is also an invention that provides a detection kit for carrying out the detection method (hereinafter also referred to as the detection kit).
- FIG. 1 is a schematic view showing a detection substrate.
- Fig. 2 shows the outline of the Invader Atsey method.
- FIG. 3 is a schematic view showing the detection substrate used in the examples.
- Fig. 4 is a photograph showing a substrate surface image showing the results of the preliminary test of this detection method.
- Fig. 5 is a photograph showing a substrate surface image that shows the usefulness of this detection method.
- the detection target is attached to the inner wall of the concave portion of the detection instrument having a plurality of concave portions on the surface, and the reaction solution containing the reactive substance for the detection target is added to the detection solution.
- the reaction solution containing the reactive substance for the detection target is added to the detection solution.
- the “detection instrument having a plurality of recesses on the surface” means a detection instrument having a recess on the surface capable of performing a liquid phase reaction.
- This detection instrument mainly means a microarray-like substrate, and its shape is mainly a substrate, but it is not necessarily limited to this shape.
- FIG. 1 is a drawing showing an embodiment of a detection substrate suitable for use in the present detection method.
- the detection substrate 10 can be manufactured by providing a large number (at least two or more) of the recesses 12 on the surface (only one side) 110 of the original substrate 11.
- the volume of the recesses 12 should be freely selected according to the volume of the liquid phase required for detecting the liquid phase reaction performed in these recesses, and should not be particularly limited. That is, the concave portion 12 needs to have a volume that is moderately larger than the volume of the liquid phase necessary for detecting the liquid phase reaction. Specifically, the volume is preferably about 100 to 6800% with respect to the necessary volume of the liquid phase.
- the volume of the required liquid phase is preferably smaller than ⁇ units.
- Each volume of the part 12 is preferably about ⁇ or less, more preferably about 0.01 ⁇ or less.
- a suitable minimum value of the volume of the recess 12 should be defined according to the measurement sensitivity of the liquid phase reaction and the technology for providing the recess 12.
- the density per unit area of the recesses 12 in the detection substrate 10 is defined according to the size of each recess 12, the technology for providing the recesses 12, and the detection technology for the liquid phase reaction. Although it should be, and should not be particularly limited, in general, it is preferably about 1 to 400 000 Zcm 2 . In the case where the reaction performed on the detection substrate is an invader method, which will be described later, it is particularly preferably about 1 to 100 0 Zcm 2 . Invader's Atsy method is used for “low processing” [when the amount of DNA to be detected is small or the number of single nucleotide polymorphisms (SNPs) to be detected is small, for example, Hundreds of individuals, for detection purposes
- the reaction performed on the detection substrate is a low-density microarray method (for example, several hundred genes whose expression level is to be examined), or a liquid-phase reaction other than the low-density Invader's Atsy method (immune reaction).
- Radioimmunoassay method, Homogeneous assay method, etc. (In the case of several types of detection target in each liquid phase reaction, etc.), particularly preferably 1 to 400 pieces / less than cm 2 .
- the reaction performed on the detection substrate is not a high-density microarray method (for example, about several thousand to several tens of thousands of genes whose expression level is examined), or the above-described high-density Invader Atsey method.
- liquid phase reactions in the case of several thousand to several tens of thousands of types of detection target in each liquid phase reaction
- 4 0 0 to 4 0 00 0 0 Zcm 2 extremely Preferably,
- the shape of the recess 12 is not particularly limited, and examples thereof include a hemispherical shape, a cylindrical shape having a hemispherical bottom, a cylindrical shape, a mortar shape, a conical shape, a pyramid shape, and a prismatic shape.
- the size of the opening of the recess 12 is maintained such that the liquid phase can be easily injected. Specifically, a diameter of about 0.1 to 0.5 mm is preferable.
- the material of the detection substrate 10 is not particularly limited as long as it has rigidity enough to withstand practical use. In particular, when the liquid phase reaction detection means is a detection means using fluorescence, the substrate is used. It is preferable that the material itself does not have autofluorescence in order to prevent the occurrence of pack ground at the time of measurement. Therefore, the detection substrate in such a case 1
- zero materials include glass, ceramics, metal, and plastic.
- plastics include thermoplastic resins.
- olefin-based polymers such as propylene polymers (polypropylene, etc.), 4-methylenopentene 1-based polymers, etc .
- Cycloolefin-based polymers such as ethylene nonolebonolene copolymers
- metholenic methacrylate polymers isobonolinole methacrylate copolymers
- acrylic polymers such as dipentapentanyl methacrylate copolymers
- cyclohexylmalate-based polymers dimethylolitaconate-based polymers, cured butyl
- thermoplastic resins examples include polyacetal resins, polycarbonates, polysulfones, aromatic polyester polyamides, polyurethanes, polyphenylene etheres, polyphenylene norides, polyimide resins, Examples include triacetyl cellulose.
- thermosetting resins include unsaturated polyesters, epoxy resins (especially alicyclic epoxy resins), three-dimensional curable polyurethanes, unsaturated acrylic resins (including epoxy acrylate resins), melamine resins. And three-dimensional styrene resin, three-dimensional silicone resin, and aryl resin (diaryl phthalate resin, diethylene glycol diallyl carbonate resin, etc.).
- surface treatment such as silicon treatment or fatty acid treatment can be performed on the detection substrate 10 made of glass or plastic according to a conventional method.
- the silicon treatment is often suitable for preventing the detection substrate 10 from adsorbing the materials and reagents used for detection to the substrate surface.
- Silicone treatment can be performed according to a conventional method. For example, by applying sol-gel method, etc., colloidal silica and other silicone raw materials are hydrolyzed. It is prepared by adding a curing catalyst, solvent, leveling agent, and UV absorber if necessary.
- the silicone coating material can be applied by a conventional method, for example, preferably, a dip method, a vapor deposition method, a spray method, a roll coat method, a flow coat method, a spin coat method, or the like.
- the detection substrate 10 can be colored to prevent, for example, autofluorescence when fluorescence is used for detection, or to prevent adverse effects caused by fluorescence emission between adjacent recesses.
- coloring saturation, hue, lightness, etc. can be selected as necessary, but generally black is preferable.
- black pigment such as carbon is mixed with the base material for coloring. It can be carried out.
- the specific size and shape of the detection substrate 10 can be freely specified, and are not particularly limited. However, a design based on a standard widely used as a microarray is suitable as an actual usage mode. .
- the detection substrate 10 is also designed to have a size and shape that match these standards. It is preferable. Specifically, it is preferable to use a plate-like shape in the vicinity of “length 26 mm ⁇ width 76 mm ⁇ thickness l mm”, which is the size of a slide glass normally used in Japan.
- the detection substrate 1 is used in accordance with the microarray shape and size standards in the region where the detection substrate 10 is used (for example, the United States (vertical 1 inch x 3 inches wide), Europe, etc.). It is preferable to design a shape and size of zero. Alternatively, it should be suitable for dispensing and detection equipment. Microarray scanners that can analyze even a microtiter plate size have been sold, and that size can be used.
- the manufacturing method of the detection substrate 10 is not particularly limited, but is usually manufactured by a method in which a concave portion is provided directly on a single substrate.
- a thin film of a material such as vinyl chloride provided with a large number of through-holes corresponding to the recesses 12 is used as a mask, and is pasted on the surface of the substrate before processing.
- Methods of forming recesses on the substrate surface by causing fine particles to collide with the substrate surface at high speeds embossing methods using molds with fine irregularities, die cutting methods, processing with fine drills, etc.
- the detection substrate 10 provided with a large number of recesses 12 on the surface can be manufactured.
- the die pressing method and the die cutting method are suitable when the material of the detection substrate 10 is plastic.
- the detection substrate 10 can be manufactured.
- the detection target is not particularly limited, and is not particularly limited as long as it is a target that can be detected by a liquid phase reaction.
- a nucleic acid DNA and DNA or RNA to be analyzed
- It may be double-stranded or single-stranded, and may have a specific three-dimensional structure such as a hairpin structure), polypeptide, antibody, bacterium, Viruses, various clinical specimens (blood specimens, urine specimens, lymph fluid specimens, synovial fluid specimens, saliva specimens, etc.) are not particularly limited.
- the detection target is preferably contained in a dispensing solution (hereinafter also referred to as the first dispensing solution) in which the first dispensing is usually performed.
- a dispensing solution hereinafter also referred to as the first dispensing solution
- the first dispensing solution includes a stabilizer according to the type of detection object, Treatment agents, immobilizing agents, and the like can be included in the solution as necessary.
- the content of the detection target in the first dispensing solution should be selected according to the type and purpose of the detection target and is not limited at all. At least, it should be more than the amount that can generate a detectable signal by contact with the reactant and less than the amount that noise can be seen.
- the reaction solution can be appropriately selected according to the type of detection target to be used and the liquid phase reaction to be selected.
- the liquid phase reaction carried out in the present invention is not particularly limited.
- a catalytic reaction of a protein such as an enzyme reaction, an antigen-antibody reaction, an interaction between proteins, a specific affinity between substances (nucleotide strands) (Including high-pridition).
- the detection of the liquid phase reaction can be performed by utilizing the means currently used in the microarray technology. Specifically, for example, the fluorescence in each small hole can be detected by using a highly sensitive fluorescence scanner on the substrate after the liquid phase reaction obtained by this detection method. In addition, detection by radioisotope, detection by EIA method, and homogenous detection such as AlphaScreen TM (manufactured by PerkinElmer (USA)) can be performed.
- Fig. 2 is a schematic diagram of the overview of the Invader Atsey method.
- the first nucleotide chain 2 2 is first hybridized with the cocoon-shaped nucleotide chain (wild type gene) 21.
- the first nucleotide chain 22 is the base complementary to the mutation detection base [in this figure, the wild type is T (thymine)] in the vertical nucleotide chain 21 [in this figure, A (adenine) ] Is the nucleotide strand complementary to the ⁇ -type nucleotide strand 21 located at the 3 'end (in this example, the 3rd and base ends of the first nucleotide strand 2 2
- the base may interfere with the association reaction between the target base of the mutation detection and the second nucleotide chain, thereby forming a partial tribasic structure.
- the second nucleotide chain 23 is further hybridized to the partial double strand of the saddle-shaped nucleotide chain 21 and the first nucleotide chain 22.
- the second nucleotide strand 2 3 is on the “complementary part” 2 3 1 3 ′ side, which is complementary to the saddle-shaped nucleotide strand 2 1, and is continuously provided with a detection element.
- the “detection moiety” 2 3 2 that is non-complementary to the saddle-shaped nucleotide chain is the 5′-side complex nucleotide chain, and the “complementary part” 2 3 1's 5 ′ most base Is a base (A) that is complementary to the base to be detected (T).
- the target nucleotide part (T) for the detection of mutation in the vertical nucleotide chain 21 is “complementary to the 3 ′ terminal base of the first nucleotide chain 22 2 and the second nucleotide chain.
- a partial three-base overlap structure is formed with the most 5 ′ base (A) of “part 2” 2 3 1.
- the nuclease 24 having an activity of specifically cleaving this partial three-base overlap structure on its 3 ′ side is allowed to act to detect the second nucleotide strand 23 3 cleaved by this nuclease.
- 2 3 2 '[3' end is a base complementary to the mutation detection base (T) (A)] to detect the nucleotide chain 2 1 force wild type Can be detected.
- a hairpin probe (nucleotide chain) 2 5, labeled with a fluorescent dye 2 5 1 near the end and a fluorescent quencher (Quencher 1) 2 5 2 near the 3 'end, is shown above.
- the above wild-type can be detected by coexisting with the hybrid system.
- the single-stranded part of the 3 ′ side of the hairpin probe 25 is designed to be complementary to the detection part 23 2 of the second nucleotide chain 23 and the most of the single-stranded part.
- the 5′-side base adjacent to the 5′-side base is the mutation detection target base (T).
- nuclease 2 4 acts again, and the hairpin probe 2 5 is cleaved between fluorescent dye 2 5 1 and fluorescent quenching substance 2 5 2, releasing fluorescent dye 2 5 1, and fluorescence quenching. It is released from the fluorescence quenching action of substance 2 5 2, and the original fluorescence can be detected. By detecting this fluorescence, it is possible to detect that the mirror-type nucleotide chain 21 is a wild-type gene in which no mutation is observed in the mutation detection target base.
- the detection target base of the ⁇ -type nucleotide chain 21 is not a wild-type base (T) but an SNP base that is G (guanine), for example.
- the complementary base is C (cytosine) complementary to G from the above A
- the sequence of the detection portion 2 3 2 and the 25 sequence is set as a separate sequence, and the fluorescent dye 2 5 1 and the fluorescence quencher 2 5 2 in the hairpin probe 25 are combined with a fluorescent dye that emits fluorescence different from the above-mentioned system.
- a fluorescence quencher for SNPs it is possible to detect SNPs in the cage nucleotide chain 21 by fluorescence of different fluorescent dyes.
- nucleotide having a wild-type base and a mutant base when mixed (hetero-type), it can be detected positively as a mixed fluorescence of the above two types of fluorescence. It is.
- the detection portion 2 3 2 is directly subjected to fluorescent labeling and isotope labeling for direct detection.
- SNP s etc. can be detected by detecting the part.
- labeling such as fluorescence It is also possible to perform negative detection where no is detected.
- the Invader Atsey method described above is technically in the stage where a nuclease that specifically cleaves a partial trinucleotide overlap structure cuts out the “detection part” of the second nucleotide chain as the reaction proceeds (
- a hairpin type probe When using a hairpin type probe, it works continuously even at the stage of separating the labeled fluorescent substance from the fluorescent quenching substance), so that the label used in the Invader'Azey method such as fluorescence is sensitized.
- This is the most suitable liquid phase reaction when a small amount liquid phase reaction as in the present invention is performed.
- this method is very useful as a method that can efficiently detect SNP s, which is the key to customized medicine. By applying the present invention to this method, it is easy and efficient. In particular, the industrial significance of detecting SNP s is enormous.
- the above-described chain-type nucleotide chain 21 is a detection target to be contained in the first dispensing solution, and other detection elements of the above-described invader method A solution containing is selected as the reaction solution.
- the first dispensing solution is dispensed into the minute recesses of the detection instrument and then dried, and the detection object is placed on the inner wall of the recess of the detection instrument having a plurality of recesses.
- a reaction solution containing a reactive substance for the detection target is brought into contact with the inner wall of the recess of the detection instrument to which the detection target is attached, and a signal generated by this contact is detected and detected.
- An object can be evaluated.
- the process of sealing and detection work is started quickly from the second dispensing, and if it is not performed correctly, the content components leak from the respective recesses onto the surface of the detection instrument, and these Mixing them may adversely affect the evaluation of the detection object.
- a specific substance that is, a temperature-responsive substance, and Z or a slowly-dissolving substance are allowed to coexist on the detection object and the inner wall of the recess, thereby detecting after the second dispensing. Even a normal engineer can secure enough time for the object to remain in the recess.
- the temperature-responsive substance is not particularly limited, but it is 10 to 90 without any additives such as salts.
- a substance that causes a phase change from a solid (gel) to a liquid in a temperature range of about 40 ° C., preferably about 40 to 70 ° C. is preferable.
- Specific examples include gelatin, agar, DPPC (Dipalmitoyl phosphati dylcholine), poly (N-isopropyl acrylamide), poly ( ⁇ -force prolatathone), etc., and gelatin is particularly preferred. It is.
- Examples of the slowly-dissolving substance include polyhydric alcohols, for example, polysaccharides such as dextran, syrup components such as maltose and trehalose, and polyethylene glycol and xylitol. Trehalose is particularly preferable. It is.
- the temperature-responsive substance and the slow-dissolving substance are selected, usually the first dispensing It can be used by being contained in a solution.
- the content of the retained substance in the first dispensing solution must be at least enough to retain the detection target in a dry, moisturized or swollen state.
- the reaction solution is dispensed (second dispensing), and the retained substance swells or swells.
- the amount of retained substance is not sufficient, It will not be completely retained in the retained substance and will be released.
- the liberated detection object is not preferable because it can be immediately mixed into the adjacent recess when the recess communicates with the reaction solution.
- the temperature-responsive substance is gelatin, it is preferably contained in the range of 0.05 to 2% by mass with respect to the first dispensing solution. 0.05 for the solution
- the first dispensing solution is usually preferably prepared by adding the detection target to an aqueous solution of the retained substance in a liquefied (sol) state and dissolving it. It is not limited and other preparation methods may be used. In addition, the first dispensing solution can be prepared immediately before dispensing into the recess of the detection substrate, or can be prepared in advance several days to several hours before dispensing.
- the storage period of the first dispensing solution is preferably selected according to the stability of the detection target. Also, at least during dispensing, the first dispensing solution needs to be liquid. Furthermore, after adding the detection target, it is not preferable to set the temperature at which the detection target denatures.
- the liquid first dispensing solution can be used for each recess of the detection device described above, but preferably a microdispensing machine (inkjet type microdispensing machine, etc.)
- the first dispensing solution in the recess is dried (preferably when the retention substance is a slowly soluble substance or when the retention substance is not used) or cooled (room temperature standing) (This is suitable when the holding substance is a temperature-responsive substance.)
- After being attached to the concave portion of the detection device, etc. it contains a reactive substance for the object to be detected in the first dispensing solution.
- the reaction solution is brought into contact with the inner wall of the recess where the first dispensing solution has been attached, and the temperature rises or falls.
- the poly (N-isopropyl atalyl amide) described above solidifies as the temperature rises. It has the property of liquefying when the temperature drops. Therefore, when this is used as a temperature-responsive substance, during the first dispensing, the temperature of the dispensing solution is lowered to the liquefaction temperature, and after the dispensing, the temperature of the recess is increased to the solidification temperature. It is preferable to bring the recess into contact with the solution and lower the temperature of the recess to the liquefaction temperature at the time of detection.] The object to be detected is released by dissolving it by leaving it, and the signal generated is detected by detecting the generated signal. Evaluation can be made.
- the reaction solution As a contact mode between the first dispensing solution attached to the wall surface of the recess and the reaction solution, the reaction solution is applied to the substrate surface after the first dispensing solution is attached. In this way, it is efficient and preferable to overlay the reaction solution.
- This detection kit is a detection kit for carrying out this detection method, comprising the following a, b and c as constituent elements. a. Temperature responsive substance, and Z or slowly dissolving substance.
- reaction solution or solute of reaction solution b.
- a detection device having a plurality of recesses.
- the collected detection object is added to a mixture of a temperature-responsive substance and Z or a slowly-dissolving substance (holding substance) and a solvent such as water.
- a solvent such as water.
- Prepare the first dispensing solution dispense the first dispensing solution into the recess of the detection substrate attached to the kit, solidify it, and follow the procedure for this detection method described above to attach the attached reaction solution.
- the detection reaction can be performed and the detection target can be evaluated.
- This detection kit should contain other necessary elements, such as the solvent used for dissolving the above-mentioned retention substances (purified water, 2-propanol, etc.), the preservative for the detection target, and the stabilizer. Is possible.
- the detection target is a nucleic acid
- the reaction solution is a solution that can perform an invader reaction on the nucleic acid.
- a detection substrate used in the present invention was prepared.
- the outline is shown in Fig. 3.
- the detection substrate shown in FIG. 3 is a slide made of polycarbonate and composed of high-density recesses.
- This detection board has 5040 openings of 0.45x0.45 mm (mm) and 0.45 mm depth on a 22x76 x 1 size plastic slide.
- the area of the entire upper surface of the recess is 21 X 60 (mm), and the capacity of one recess is 44-nl.
- the upper part is cut with a 0.05 mm partition between the recesses.
- the dispensing object was dispensed into each recess using an inkjet microdispensing machine (Cartesian's synQUAD TM).
- the stained shape was different depending on the concentration of gelatin mixed with DNA. That is, in the recess where the DNA did not dissolve into the solution from the inner wall surface of the recess, the DNA stuck to the inner wall surface of the recess was stained in an angular donut shape (with a gelatin concentration of 0.05% or more). In addition, the DNA was dissolved in the recesses with a concentration of 0.025% or less, and a fluorescence signal was observed in the recesses other than the inner wall, and a fluorescence signal was also observed in the recesses adjacent to the dispensing recesses.
- the fluorescent scanner is ScanArray5000 (currently
- reaction solution can be dispensed with genomic DNA mixed with gelatin at a concentration of 0.05% or more without affecting the adjacent recesses.
- the detection method using this detection method requires special equipment. Therefore, it is not necessary to finely adjust the position of the discharge outlet tip for each recess when dispensing, and the dispensing volume is a method that fills the entire volume of the recess, so there is little error and it should be a quick, simple, and inexpensive method. There was found. Industrial applicability
Abstract
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PCT/JP2004/012043 WO2006018899A1 (ja) | 2004-08-17 | 2004-08-17 | 検出用器具を用いた検出方法 |
US11/660,372 US20080020466A1 (en) | 2004-08-17 | 2004-08-17 | Detection Method Using Detecting Device |
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US20020006664A1 (en) * | 1999-09-17 | 2002-01-17 | Sabatini David M. | Arrayed transfection method and uses related thereto |
US6852510B2 (en) * | 2000-07-03 | 2005-02-08 | Gala Design Inc | Host cells containing multiple integrating vectors |
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2004
- 2004-08-17 WO PCT/JP2004/012043 patent/WO2006018899A1/ja active Application Filing
- 2004-08-17 US US11/660,372 patent/US20080020466A1/en not_active Abandoned
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2002025289A1 (fr) * | 2000-09-18 | 2002-03-28 | I-Card Corporation | Ensemble de micro-coupelles et procede permettant d'enfermer hermetiquement des liquides au moyen de cet ensemble |
JP2003066041A (ja) * | 2001-08-14 | 2003-03-05 | Internatl Reagents Corp | プローブ溶解液およびプローブの固定化方法 |
WO2003031972A1 (fr) * | 2001-10-05 | 2003-04-17 | Bml, Inc. | Plaque de detection |
JP2004170127A (ja) * | 2002-11-18 | 2004-06-17 | Olympus Corp | 抗体試験のための血球試薬 |
JP2004201589A (ja) * | 2002-12-25 | 2004-07-22 | Hitachi Ltd | 細菌同定方法 |
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